How Thermal Scanners Can Help Detect A Fever
                     How Thermal Scanners 
Can Help Detect A Fever?
https://www.opticsindia.com/infrared-ir-thermometer/

 Optica, the manufacturer of Opto Scan Thermal Scanners, is at pains to remind the 
public that thermal scanners are not medical devices.
 As such, they cannot be relied upon to single-handedly detect or diagnose 
coronavirus (COVID-19), SARS, H1N1, or a fever.
 However, they are incredibly effective at detecting small deviations in the surface 
temperature of objects and people. As such, they are a useful tool in screening for 
people that might be showing the symptoms of a viral infection, such as a fever.
 Our thermal scanners are so sensitive that people often think they can see through 
things with them. For example, if you point one of these devices at a wall you can 
often ‘see’ the studs behind the wall. You are not actually seeing through the wall, 
but rather observing the minute differences in surface temperature where the wall 
has a support structure behind it, and where it does not.
Thermal Scanners Detect Elevated 
Body Temperature
 This is what they most certainly can detect. After all, someone with an 
elevated body temperature may have coronavirus, a fever, or they may have 
just been for a run.
Which Thermal Scanners Have Fever 
Detection 'Screening Mode'?
 The screening mode shows:
 The sampled average temperature.
 The alarm temperature.
 The measured temperature.
 One of the key benefits is the audio alarm that sounds if someone passes 
through the detection area with an elevated temperature. This makes these 
cameras ideal for relatively high traffic areas such as airports, train stations, 
ports, and large office buildings.
 Other Thermal Scanning Options To Detect People Who May Have Coronavirus 
(COVID-19)
 The above mentioned thermal scanners are relatively expensive. While they 
are the best tool for the job, there are some lower-cost thermal cameras 
which are also worth considering.
 Opto Scan Non-Contact IR Thermometer have an inbuilt ‘above alarm’ mode. 
Unlike the ‘screening mode’ described above, this is a visual alarm.
 As such, these body temperature scanner can also be used to detect people 
with a coronavirus fever. They’re more suited to situations where the flow of 
people is less than at an airport or mass transit terminal. I am thinking of 
applications such as scanning workers as they enter a factory. Or scanning 
staff and customers as they enter your workplace.
Other Options to Detect Elevated Body 
Temperature
 As you go further down Opto Scan’s range, many of the cameras are still 
accurate and useful for a wide range of applications. But their lower thermal 
resolution means you need to be more careful when taking
readings of human body temperature.
 In summary, thermal cameras can be more useful than other screening options 
like non-contact thermometers. Non-contact thermometers need the subject to 
be very close (15cm from forehead). Manufacturers of non-contact thermometers
 also suggest taking three measurements of a subject and taking the average, 
which is slow to check many people.
 On the other hand, as you can see from the examples above, thermal cameras 
can provide a quicker and more detailed scan of people as they pass through an 
area. Unlike non-contact thermometers, thermal cameras have an array of 
thermal detectors constantly taking an average reading of the target area.
Thank You!